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A 50-Inch Air Terminal?

Do not let the maximum spacing language in NFPA 780 lull you into a false sense of complacency. Here’s a refresher on why the third-dimension matters.

When placing air terminals on a flat roof or gently sloping roof per NFPA 780-14, many recognize the 50-ft maximum spacing between air terminals rule (Sec. 4.7.5), but overlook the section’s second sentence. Give it a second read to avoid a non-compliance situation.

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